Interface AssetConfigurator<A, G>

interface AssetConfigurator<
    A extends Record<string, unknown>,
    G extends string = never,
> {
    add<K extends string, T>(
        key: K,
        loader: () => Promise<T>,
    ): AssetConfigurator<A & Record<K, T>, G>;
    addGroup<
        GN extends string,
        T extends Record<string, () => Promise<unknown>>,
    >(
        groupName: GN,
        assets: T,
    ): AssetConfigurator<
        A & { [K in string
        | number
        | symbol]: Awaited<ReturnType<T[K]>> },
        G | GN,
    >;
    addWithConfig<K extends string, T>(
        key: K,
        definition: AssetDefinition<T>,
    ): AssetConfigurator<A & Record<K, T>, G>;
}